Fibrous product



Patented Jan. 1 7, 1933 GEORGE JAMES MANSON, OF HAWKESBURY, ONTARIO,CANADA, ASSIGNOR, BY

ASSIGNMENTS, T0 MANSON CHEMICAL COMPANY, OF MONTGLAIR, NEW JERSEY,

A CORPORATION OF NEW JERSEY FIBR'OUS PRODUCT 1T0 Drawing. Originalapplication filed July 8, 1926, Serial No. 121,261. Divided and thisapplication filed April 25, 1927.

This invention relates to improvementsin water proofed fibrous products,such as paper or fibre board, and the objects of the invention are toprovide such a product as may be 5 manufactured at low cost and withoutdisturbances of the usual technical process by which the paper, fibreboard or the like is manufactured. Y

This is accomplished by the use of an improved waterproofingagentproduced in the manner described in my co-pending applicationSerial No. 121,261, filed July 8th, 1926, of which the presentapplication is a division.

In emulsions of the character to which this invention refers, it isdesirable that the emulsions when formed should be freely diluted withwater, and to this end that the individual particles of wax should bethinly coated with the emulsifying medium so that their bulk will not beunduly increased, and the particles remain in discrete form without anytendency to tackiness. I have found that it is possible to form a thinbut sulficient coating about the particles of wax by forming a gel inthe emulsified mixture rather than by adding a preformed emulsifiedagent thereto.

Such a gel may be formed by a variety of compounds, as for example bycombining a I water soluble acid salt with a silicate, the reacting ofwhich is preferably caused to take place while being mixed with themolten wax while the whole mass is agitated and/or in rapid motion.

Of water soluble electrolytes which may be used I may mention magnesiumchloride, magnesium'sulphite, aluminum sulphate, calcium chloride, orother electrolytes of a'similar nature. Sodium silicate may beconveniently used as a silicate to form the gel or gelatinous coatingmaterial. The method is applicable to wax which may be animal, mineralor vegetable wax, as well as the emulsification of these ingredientswith themselves 5 or with wax.

Serial No. 186,603.

In practicing the-method, the wax or other water repellent material ismelted and mixed with water containing in solution the sodium silicate.The solution of an electrolyte or electrolytes is then added, of thecharacter above described, and the mixture stirred, the

temperature being above the melting point of Example I 100 pounds ofMontan wax (a water repellent substance) is melted and 8 pounds ofsodium silicate (a water soluble substance) is added in 120 pounds ofwater; this solution is heated to about 10 above the melting point ofMontan wax; the mixture of melted Montan wax and the solution of sodiumsilicate is then rapidly stirred and 4 pounds of magnesium sulphate (awater soluble material) dissolved in 40 pounds of water is added. Agelis immediately formed about the articles of Montan wax, keeping themom coalescing together when the mixture cools. It will be seen that bythis means the wax is maintained in a finely divided state and in acondition which enables it tobe readil disseminated through any materialwi which it is to be used.

Example [I 33.0% paratfin wax 4.0% silicate of soda plus (65% of thetotal water). 2.0% alum-plus(35% of the total water) 1.0% glue(added tosilicate of soda) 60.0% water The silicate of soda is added to themelted wax in a disintegrator and the alum is added after thoroughagitation. V'Vorking temperature 170 F.

Example III The silicate of soda is added to the melted wax in adisintegrator'and the alum is added after thorough agitation. W'orkingtem- 20 perature 170 F.

E mample I V 31.0% parafiin wax 7.0% Montan-(melted with wax) 2.65%silicate of sodaplus(65% of the total water) 1.35% alum-plus(35% of thetotal water) 7 58.0% water The silicate of soda is added to the meltedwax in a disintegrator and the alum is added after thorough agitation.IVorking temperature 170 F.

The mixture or emulsion may be used to waterproof paper or textilematerials. In waterproofing paper, the mixture may be added to thebeater with or without waterproofing agents and coagulating agents.

Alum, for instance, may be added to complete any coagulating eii'ec'trequired. Owing to the peculiar modifying qualities of the encasing orencysting mineral precipitate on the wax particle (which may beattributed to the method offorming the wax dispersion) so great aproportion of alum as is customarily employed with, for example, resinsize, need not be used in the practice of the preferred form of thepresent invention.

The method may be applied in a similar way to other fibrous productsthan paper.

As many changes could be made in the above method and many apparentlywidely different embodiments of my invention, within the scope of theclaims, constructed Without departing from thespirit or scope thereof,it is intended that all matter contained in the accompanyingspecification may be interpreted as illustrative and not in a limitingsense. v

In companion co-pending application, Serial No. 186,601, filed April 25,1927, there is claimed methods of making paper products by incorporationof paper pulp with gel encysted water-repellent substances in finely '65divided condition.

What I claim as my invention is:

1. As a new article of manufacture, a fibrous product made from a pulpcarrying a dispersion of gel-encysted water-repellent substance. 7

2. Stock from which fibrous products" are to' be produced, said stockcarrying a gel coated water repellent substance 3. Pulp from whichfibrous products are to be produced, said pulp carrying a dispersion ofa gel-encysted Water repellent substance.

4. Stock from which fibrous products are to be produced, said stockcarrying a dispersion containing an encysted water repellent substanceand glue.

5. Stock from which fibrous products are to be produced, said stockcarrying a gelencysted water repellent substance and glue.

6. Pulp from which fibrous products are to be produced, said pulpcarying a water repellent substance, .glue, and a preservative for theglue.

7 As a new article of manufacture, a fibrous product produced from apulp incorporated with a dispersion of a water-repellent substancesimultaneously dispersed in an aqueous medium while encysting saidWaterrepellent substance with a precipitated gel formed by doubledecomposition.

8. As a new article of manufacture, a fibrous product produced from apulp incorporated with a dispersion of a wax simultaneously dispersed inan aqueous medium while encystin g said wax with a precipitated gelformed by double decomposition.

9. As a new article of manufacture, a fibrous product produced from a'pulp incorporated with a dispersion of a water-repellent substancesimultaneously dispersed in an aqueous medium while encysting saidwaterrepellent substance with a precipitated gel formed by doubledecomposition, and coagulated therein.

In witness whereof I have hereunto set my hand.

GEORGE JAMES MANSON.

